On Sun, Apr 16, 2023 at 06:15:00PM +0300, Leho Kraav wrote: > I'm trying to use NetworkManager built-in hotspot functionality with ASUS AC51 USB. > > This uses wpa_supplicant over DBus. While 5 GHz hotspot and bridge work great at setup level, for some reason, my transfers are capped at exactly 54 Mbps. > > I've also tested hostapd: was able to configure it to 80 MHz, and get (exactly) 4x higher speeds, or ~220 Mbps. > > What is going wrong for wpa_supplicant? Isn't it supposed to be able to autoconfigure the adapter to the max of its capabilities? > From wpa_supplicant logs, I'm unclear on who's forcing `bandwidth=20` - is it NetworkManager, or wpa_supplicant's autoconfiguration? > Why isn't it configuring for more? Hi, I think that to enable wider channels there must be explicit configuration in wpa_supplicant and NetworkManager is not passing that configuration (for example, parameters "ht40", "max_oper_chwidth", "vht_center_freq1") because it's not clear it would work for everybody; I mean, the hotspot functionality wouldn't be able to start if NM sets e.g. ht40=1 and the card doesn't support it, or the channels are wrong. Please see this NetworkManager issue: https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues/1243 One approach would be to make the channel width configurable in NetworkManager, so that it can send the appropriate parameters to wpa_supplicant. Or, if there is way for NM to detect the best parameters automatically, that would be even better; but I'm not sure if this is possible. Any other ideas, thoughts? Thanks, Beniamino
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